Hello,
In sales orders I change the quantity, but the discount amount field remains $10 instead of changing value due to the appropriate sales order count, in this case it must be $100. In below screenshot you can see that the discount for total amount remains the same.
The percentage-based discount works correctly, but the fixed amount discount is only applied to 1 unit. When the sales order quantity changes, the total discount amount does not update accordingly.
Do you have any solutions about it?

Thank you in advance for your answers.